from here onward. Due to an identity for a special case of
\(9j\) -symbol [1]},
\(\begin{Bmatrix}0 & 0 & 0 \\l_1^{\prime } & l_2^{\prime } & l_3^{\prime } \\l_1 & l_2 & l_3\end{Bmatrix}= \frac{\delta _{l_1l_1^{\prime }}\delta _{l_2l_2^{\prime }}\delta _{l_3l_3^{\prime }}}{\sqrt{\lbrace l_1\rbrace \lbrace l_2\rbrace \lbrace l_3\rbrace }},\) 
